Technical data

576 COMpact 3000 analog/ISDN/VoIP - Firmware Version 4.0 - Version of the Manual 03 02/11
Glossary
Terminology and Functions
S
Short-code Numbers
In order to not always have to retype frequently-dialled telephone numbers on telephones that
do not support a telephone book, these numbers can be saved under 2 to 4-digit short-code
numbers. When short-code numbers are entered, the PBX automatically dials the exchange
line access number on the PBX and the external telephone number saved under the short-code
number.
SIP
SIP (Session Initiation Protocol) is a network protocol which provides establishing a communi-
cation session between two ore more subscribers. Via SIP only communication conditions are
arranged. For actual data transmission other protocols are responsible, as RTP, for example.
SIP Port
The SIP port is entered as the port of the local system which has to be used as the output port
for the SIP transfer.
SIP-DDI (SIP Trunking)
Some VoIP providers also support a VoIP point-to-point connection with a direct extension
option. The provider allocates a PBX base number with additional extensions (DDI),
e.g., 9200–0.
Soft Call
With the soft call function, a user can use the Web interface of the PBX to dial an external
telephone number from the telephone book, the call data list, an RSS feed or by entering his
own telephone number. To do this, the user must log into the Web interface with his user PIN.
Splitting
Splitting is the switching between two calls. As opposed to a conference call, you can only
speak to each communication partner by going back and forth between the two. When you
speak with one communication partner, the other call is kept on "hold".